US3869933A - Structures of reinforced elastomeric material - Google Patents

Structures of reinforced elastomeric material Download PDF

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Publication number
US3869933A
US3869933A US412072A US41207273A US3869933A US 3869933 A US3869933 A US 3869933A US 412072 A US412072 A US 412072A US 41207273 A US41207273 A US 41207273A US 3869933 A US3869933 A US 3869933A
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US
United States
Prior art keywords
belt
sleeve
belts
tension member
bottom surfaces
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US412072A
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English (en)
Inventor
Marvin L Dorf
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Goodyear Tire and Rubber Co
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Goodyear Tire and Rubber Co
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Filing date
Publication date
Application filed by Goodyear Tire and Rubber Co filed Critical Goodyear Tire and Rubber Co
Application granted granted Critical
Publication of US3869933A publication Critical patent/US3869933A/en
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Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G5/00—V-belts, i.e. belts of tapered cross-section
    • F16G5/12—V-belts, i.e. belts of tapered cross-section made of plastics
    • F16G5/14—V-belts, i.e. belts of tapered cross-section made of plastics with reinforcement bonded by the plastic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D29/00—Producing belts or bands
    • B29D29/10—Driving belts having wedge-shaped cross-section

Definitions

  • V-belts that is to say transmission belts of generally truncated triangular cross-section and having embedded therein a high tensile reinforcing layer extending in the direction of and around the belt.
  • Belts of this kind are generally manufactured by building first of all a wide flat continuous belt comprising the elastomeric body material with the high tensile reinforcement at a suitable depth therein, followed by cutting the resulting flat belt into relatively narrow strips.
  • the high tensile reinforcement has been located eccentrically, and the required V-shape obtained by cutting triangular sections of waste stock in such a way that the aforesaid high tensile reinforcement is always located towards the wide face of the resulting V-belts.
  • the V-belts are cut so as to face all in the same direction from the parent flat belt, with inevitable generation of a substantial amount of waste or scrap elastomer.
  • Proposals have been made to adopt a so-called balanced cut belt, in which the high tensile reinforcement is located centrally of the belt section and the parent flat belt is cut at an angle which alternates between a left hand and,
  • the invention consists in a V-belt, having a crosssection exhibiting a symmetrical construction about a central line corresponding to a median plane of the belt mid-way between its wide and narrow faces, the annular high tensile reinforcement of the belt being located at this central plane and being sandwiched between layers of a fabric bracing material having high compressive and tensile moduli transversely of the belt.
  • the belt can be cut from a parent flat belt in a balanced manner as already described i.e., without waste, alternating V- belts being turned inside out.
  • the layers of bracing material serve to enhance very substantially the resistance of the belts to sagging in the eventual transmission pulley which has been a serious defect of prior balanced cut V-belts.
  • the belt will comprise one or more fabric plies at or adjacent the inner and outer faces which are of a nature to afford a substantial degree of stretch under conditions of use to which end the fabric may be woven and laid on the bias.
  • the inherent stretch of these inner and outer plies when used will be at least 7 percent, and preferably at least 10 percent.
  • the main body of the belt of so-called cushion stock may have a conventional orientated fibre reinforcement in which the fibres lay mainly crosswise of the belt and enhance its sideways rigidly, still leaving the belt flexible in the longitudinal direction so that it can bend readily around smaller pulleys.
  • the high tensile reinforcement will be embedded in a body'of elastomer.
  • This may also be optionally fibre-loaded, orientated-fibre loaded with the fibres lying mainly crosswise of longitudinally of the belt.
  • Stock of a relatively high durameter hardness is preferred. This so-called insulation stock will suitably be formulated to give good adhesion to the tensile reinforcement and to the bracing material.
  • the high tensile reinforcement can be any ofthc various continuous filament fibres known for this purpose such as glass, nylon, polyester, fibre B or Nomex twisted into what is commonly known as cable cord or it can take the form of monofilament the diameter of which can be anywhere from 0.020 to 0.150 inch depending upon the cross sectional size of the belt.
  • This cord may be dipped and heat processed in a known manner to give it a high tensile modulus such that it will yield a low stretch belt.
  • the dipping and heat treatment serve to unify the cord with a suitable (usually) cured elastomeric or plastomeric impregnant.
  • the bracing material can comprise various kinds of synthetic yarn fabric comprising macrofilament, monofilament, filament or. staple yarns usually of the socalled tyre cord classification clipped and heat treated in such a manner to impart both a high tensile and a high compression modulus.
  • This bracing material is placed during building up of the parent belt in such a manner that the high tensile and high compression properties are manifested crosswise of the belt.
  • the material is preferably placed on the bias.
  • V-belts in accordance with the invention can be provided in a wide range of sizes ranging for example from miniature belts of A inch top width to large belts of up to 4 inch top width although the invention is particularly useful in connection with belts of about inch /2 inch top width for automotive use.
  • the distance between the bracing material and the central high tensile member will depend on the size of the belt crosssection but may generally vary from a few thousandths of an inch to 0.150 inch. In the larger belts there may be two or even three layers of bracing material on each side of the tension member.
  • FIG. 1 illustrates a conventional mode of making a V-belt
  • FIG. 2 shows the lay out of a balanced cut
  • FIG. 3 shows the internal construction of a parent belt from which V-belts according to the invention may be cut
  • FIG. 4 shows a cross section of a belt according to the invention seated in a transmission pulley and FIG. 5 is similar to FIG. 4 but showing the effect of omitting the bracing member.
  • the prior art V-belt has been cut from a parent flat belt generally indicated at 2 by the removal of spaced portions 3 of triangular section.
  • the high tensile reinforced layer 4 has been spaced relatively closely to a fabric cover 5 on the wide face of the belt the balance being essentially cushion stock 6.
  • the cut-out sections 3 have in general been waste scrap. Even in cases where the cuts are made into the uncured rubber reuseof the cut awayportions has been difficult especially in the case of orientated fibre reinforcing cushion stock.
  • FIG. 2 shows how the balanced cut belt is made, alternate cuts 7 and 8 being at opposite orientations to the median plane 9 of the belt where in this case the high tension reinforcement is located.
  • a like fabric layer is of course to be provided at each side of the belt 2 (assuming such layer is used at all) since alternate belts 10 and 11 must be of the same construction and belt 11 has to be turned inside out.
  • the belt 2 from which V- belts in accordance with the invention and as shown in FIG. 4 will be cut is of symmetrical construction about the medianplane 9 where the high tensile reinforcement is located, consisting of the high tensile cords 12.
  • these high tensile cords 12 will normally be wound helically so they extend continuously around the belt.
  • a bracing layer 13 Closely adjacent each side of the layer of the cords 12 is a bracing layer 13 these three layers being bonded together by a body of reinforced elastomer 14 of insulation stock as already described.
  • the outer faces of the belt 2 comprise bias'cut fabric plies 15; between the plies 15 and the bracing material 13 is a body of cushion stock 16.
  • FIG. 4 which is self explanatory shows a V-belt in accordance with the invention seated in a transmission pulley under tension.
  • FIG. 5 shows the same general construction, except that the bracing layers 13 are omitted, with resultant loss of transverse stiffness and consequential sagging of the belt towards the bottom pulley. This sagging is of course largely a result of the location of the reinforcing cord at a position remote from the outer face of the belt, so that less cord is directly supported by the pulley walls.
  • V-belts in accordance with the invention is a greatly reduced tendency to turn over in the pulley groove, as compared with a conventional belt, at high speeds, with cyclic loads or on mule drives.
  • An endless V-belt structure having top and bottom surfaces and side driving faces extending therebetween, said belt comprising a body portion of elastomeric material and having a tension member therein midway between the top and bottom surfaces of said belt and at least one fabric reinforcing layer symmetrically positioned on each side of said tension member between said tension member and the top and bottom surfaces of said belt, said reinforcing layers having high compressive and tensile moduli in the transverse direction of the belt whereby the V-belt is of a symmetrical construction about said tension member.
  • a belt as claimed in claim 1 in which at least a portion of the body of said belt is formed of fiber-loaded elastomeric material.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)
  • Woven Fabrics (AREA)
US412072A 1972-11-14 1973-11-02 Structures of reinforced elastomeric material Expired - Lifetime US3869933A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5264072A GB1400799A (en) 1972-11-14 1972-11-14 V-belts

Publications (1)

Publication Number Publication Date
US3869933A true US3869933A (en) 1975-03-11

Family

ID=10464709

Family Applications (1)

Application Number Title Priority Date Filing Date
US412072A Expired - Lifetime US3869933A (en) 1972-11-14 1973-11-02 Structures of reinforced elastomeric material

Country Status (11)

Country Link
US (1) US3869933A (it)
JP (1) JPS49133741A (it)
AR (1) AR198883A1 (it)
AU (1) AU473222B2 (it)
BR (1) BR7308825D0 (it)
CA (1) CA979243A (it)
DE (1) DE2357417B2 (it)
FR (1) FR2206823A5 (it)
GB (1) GB1400799A (it)
IT (1) IT1001725B (it)
ZA (1) ZA738170B (it)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3941005A (en) * 1975-03-03 1976-03-02 The Gates Rubber Company Power transmission belt
DE2633966A1 (de) * 1975-07-28 1977-02-03 Dayco Corp Endloser kraftuebertragungs- keilriemen
US4231826A (en) * 1978-12-22 1980-11-04 The Gates Rubber Company Process for forming V-belts and belt sleeves
US4264315A (en) * 1978-12-16 1981-04-28 Mitsuboshi Belting Ltd. Power transmission V-belt and method of manufacturing
US4493681A (en) * 1982-01-26 1985-01-15 Mitsuboshi Belting Ltd. Reinforced cog belt
US4734086A (en) * 1975-07-28 1988-03-29 Dayco Products, Inc. Endless power transmission belt structure
US5183521A (en) * 1990-04-24 1993-02-02 Pirelli Trasmissioni Industriali S.P.A. Process and apparatus for producing splined driving belts
US20060234820A1 (en) * 2005-04-14 2006-10-19 Nitta Corporation Flat belt
US10716912B2 (en) 2015-03-31 2020-07-21 Fisher & Paykel Healthcare Limited User interface and system for supplying gases to an airway
WO2021016495A1 (en) 2019-07-23 2021-01-28 Gates Corporation Center cord-line v-belt
US11324908B2 (en) 2016-08-11 2022-05-10 Fisher & Paykel Healthcare Limited Collapsible conduit, patient interface and headgear connector

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3948113A (en) * 1974-11-29 1976-04-06 The Goodyear Tire & Rubber Company Multi-ribbed power transmission belt and method of making said belt
US4131030A (en) * 1977-11-02 1978-12-26 Dayco Corporation Covering for power transmission belt
US4778437A (en) * 1983-04-15 1988-10-18 The Goodyear Tire & Rubber Company Heavy duty V belt
JPH01270091A (ja) * 1988-04-22 1989-10-27 Canon Inc 画像表示システム
JPH0222434U (it) * 1988-07-28 1990-02-14
JP6837920B2 (ja) * 2016-06-14 2021-03-03 三ツ星ベルト株式会社 ラップドｖベルト、及びラップドｖベルトの製造方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2442037A (en) * 1945-04-19 1948-05-25 Wingfoot Corp Wedge belt

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD56141A (it) *
US2330500A (en) * 1939-08-07 1943-09-28 Leifer Alfred Power supply circuit
CH254898A (de) * 1947-04-29 1948-05-31 Int Aktiengesellschaft Fuer Ga Endloser Keilriemen.
FR1094626A (it) * 1952-12-23 1955-05-23
US2847865A (en) * 1952-12-27 1958-08-19 Dayton Rubber Company V-belts
DE1057399B (de) * 1953-07-10 1959-05-14 Dayton Rubber Company Aus Schichten aufgebauter Riemen
FR1115304A (fr) * 1953-12-09 1956-04-23 Goodrich Co B F Courroie de transmission
DE1740238U (de) * 1955-04-01 1957-02-21 Phoenix Gummiwerke Ag Keilriemen mit verstaerkungseinlage.
GB1187266A (en) * 1966-08-26 1970-04-08 Dayco Corp V-Belts
US3566706A (en) * 1968-06-25 1971-03-02 Sidney R Fix Power transmission belt

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2442037A (en) * 1945-04-19 1948-05-25 Wingfoot Corp Wedge belt

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3941005A (en) * 1975-03-03 1976-03-02 The Gates Rubber Company Power transmission belt
US4734086A (en) * 1975-07-28 1988-03-29 Dayco Products, Inc. Endless power transmission belt structure
DE2633966A1 (de) * 1975-07-28 1977-02-03 Dayco Corp Endloser kraftuebertragungs- keilriemen
DK156258B (da) * 1975-07-28 1989-07-17 Dayco Products Inc Kilerem
US4264315A (en) * 1978-12-16 1981-04-28 Mitsuboshi Belting Ltd. Power transmission V-belt and method of manufacturing
US4231826A (en) * 1978-12-22 1980-11-04 The Gates Rubber Company Process for forming V-belts and belt sleeves
US4493681A (en) * 1982-01-26 1985-01-15 Mitsuboshi Belting Ltd. Reinforced cog belt
US5183521A (en) * 1990-04-24 1993-02-02 Pirelli Trasmissioni Industriali S.P.A. Process and apparatus for producing splined driving belts
US20060234820A1 (en) * 2005-04-14 2006-10-19 Nitta Corporation Flat belt
US10716912B2 (en) 2015-03-31 2020-07-21 Fisher & Paykel Healthcare Limited User interface and system for supplying gases to an airway
US11904097B2 (en) 2015-03-31 2024-02-20 Fisher & Paykel Healthcare Limited User interface and system for supplying gases to an airway
US11324908B2 (en) 2016-08-11 2022-05-10 Fisher & Paykel Healthcare Limited Collapsible conduit, patient interface and headgear connector
WO2021016495A1 (en) 2019-07-23 2021-01-28 Gates Corporation Center cord-line v-belt
US20220316555A1 (en) * 2019-07-23 2022-10-06 Gates Corporation Center cord-line v-belt
US12055197B2 (en) * 2019-07-23 2024-08-06 Gates Corporation Center cord-line V-belt

Also Published As

Publication number Publication date
FR2206823A5 (it) 1974-06-07
IT1001725B (it) 1976-04-30
CA979243A (en) 1975-12-09
DE2357417A1 (de) 1974-05-16
DE2357417B2 (de) 1981-03-19
AU6169773A (en) 1975-04-24
ZA738170B (en) 1974-08-28
JPS49133741A (it) 1974-12-23
BR7308825D0 (pt) 1974-08-22
AR198883A1 (es) 1974-07-24
AU473222B2 (en) 1976-06-17
GB1400799A (en) 1975-07-23

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